My parents very old fashioned, they thought it only okay to leave parent home if getting married! I wanted to get own place at nineteen (was studying, working, paying for own studies etc) but mother thought it would look bad for her if I left home and not married - like maybe I was unhappy at home, or maybe I was on drugs or sleeping around or something. But truth was... I WAS unhappy at home, mother wanted me to still behave like I was 8-year old, couldn't accept she didn't rule every piece of my life. We had lots of fights, sometimes she right ( me use house like hotel) sometimes she wrong(me have curfew at 11pm but work only finish at 11pm, still have cash-up lock-up etc so she lock me out of house, me sleep in car and big fight in morning loys of times).
I move out age 20, had to move back in age 22 for 6 months (I started business, it failed) but then started new buisiness and move out for good. that was 20 years ago!